Calculation of rational numbers 3,7, - 5, - 13.24

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• 1. Four rational numbers 3,7, - 7, - 3 are operated by 24 points Give the formula
• 2. There are four rational numbers: 3, - 5,2, - 13. How to calculate 24
• 3. Add the operation symbol between 4, 4, 10 and 10 to make the result equal to 24
• 4. Fill in the operation symbol in 1 3 5 7 to make the result equal to 24
• 5. Fill in some operation symbols in 5 6 7 8 to make the result 24?
• 6. There are four groups of numbers below. Can you add the operation symbol to make the result all be 24? （1）2 3 4 6 （2）2 5 6 8 （3）1 2 3 10 （4）3 6 7 8
• 7. How to add operation symbol for 7 () 9 () 12 () 3 2 = 90
• 8. Fill in the appropriate operation symbol to make the equation hold, 9 () 9 () 9 () 9 = 18 Only add and subtract symbols can be filled in
• 9. 9 7 5 4 fill in the operation symbol to make the equation hold
• 10. 12 〕 37 〕 5 〕 6 〕 7 = 1998, fill in the appropriate operation symbol in 〕 to make the equation hold! Urgent!
• 11. How much is [5 / 6 - {5 / 14-2 / 7] × 7 / 18
• 12. What's 30 times 5 / 18
• 13. What's six out of thirty equal to five out of ten divided by 20 equal to 18 out of ten
• 14. 12 out of 25 = how much: 50 = 18:1 how much = how much%
• 15. 25 points 12 equals (): 50 = 18: () = ()%
• 16. What is 1 in 18 to the power of 0 What is the 0 power of (- 100)
• 17. How much is five thirds plus one ninth?
• 18. -5 - (- 13) =? How much is minus five minus thirteen? Why?
• 19. A number plus 50% of it is 13.5. What's 80% of the number
• 20. Hello, I'd like to ask you: what number and minus five out of twelve equals minus one?